Graphophone-modulator.



No- 799,898. PATENTED SEPT. 19,1905.

' F. N. FOSTER.

GRAPHOPHONE MODULATOR.

APPLICATION FILED 1330.19, 1904. I

UNITED STATES PATENT OFFICE.

FRANK N. FOSTER, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR OF TWO- FIFTHS TO W. CLAUD PRICE, OF GRAND RAPIDS, MICHIGAN.

GRAPHOPHONE-MODULATOR.

Specification of Letters Patent.

Application filed December 19, 190-; Serial No. 237,432.

Patented Sept. 19, 1905.

To all whm'n it ntay concern:

Be it known that I, FRANK N. Fos'rER, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Graphophone- Modulators; and I do hereby declare the fol lowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in devices for modulating the sound of a graphophone; and its object is to provide a simple, chea and effective device that may be readi y attached to the sound-box of the graphophone as ordinarily constructed and to provide the device with various new and useful features hereinafter more fully described, and particularly pointed out in the claims.

My invention consists, essentially, of a suitable su port adapted to be readily attached to tfie sound-box of a graphophone, a yielding member mounted on said support and adapted to yieldingly'engage the stylusbar of the graphophone, and means for adjusting the tension of said member to vary the tension of the disk, whereby the action of the sound-producing mechanism may be more or less modified at pleasure and Whereby the device may be readily and quickly applied and detached, as occasion requires, as will more fully appear by reference to the accompanying drawings, in which- Figure 1 is a front elevation of the soundbox of a graphophone with my device attached thereto; Fig. 2, a plan view of the same, and Fig. 3 a perspective detail of my device detached.

Like numbers refer to like parts in all of the figures.

1 represents the sound-box of a graphophone as usually constructed; 2, the vibrating disk thereof; 3, the bar which vibrates the disk. My device consists of a suitable clamp or support 4, having a yielding curved middle portion and providedwithrearwardlybent portions 5 adapted to embrace the opposite sides of the sound-box 1 and inwardlyturned ends 6 to engage the rear of the soundbox, whereby a detachable support is provided that will yieldingly engage the opposite sides of the sound-box and extend transversely across the front of the same.

7 is a flexible member consisting of astrip.

of suitable material secured at one end to the support 4 and extending at its free end opposite the stylus-bar 3 and provided at this end with a suitable elastic pad 8 to yieldingly engage said bar. This member 7 is provided with a suitable means of adjusting its tension, preferably consisting of a thumb-screw 9, extending through a threaded opening in the support 4-and engaging the said member. By turning this screw more or less pressure of the pad 8 will be brought to bear upon the bar 3, and thus its vibration is more or less restricted and the tension of the disk 2 varied as occasion may require, the effect being to modify the action of the sound-producing mechanism of the graphophone at pleasure by adjusting the screw 9.

It is obvious from the foregoing description that this device is readily attached to the sound-box of the graphophone as usually constructed and quickly adjusted to vary and modify the operation of the sound-producing mechanism thereof.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. A modulator for a grapho hone comprising a support adapted to yie dingly embrace a sound-box and extend across the front of the same, a yielding member attached to said support at one end and provided with an elastic pad at the other end adapted to engage the stylus-bar of the graphophone, and an adjusting-screw in the support and engaging said member.

2. The combination of a support comprising a curved middle portion embracing end portions and inwardly-turned ends, a flexible member attached at one end to the support, an elastic pad on the other end of said-member, and an adjusting-screw extending through a threaded opening in said support and engaging said elastic member.

3. The combination of a support having opposing and yielding portions to embrace the opposite sides of a soundboX and adapted to extend across the front of said box, an elastic pad to yieldingly engage the stylusbar of the same, and means for adjusting the pressure of said pad against said bar.

4. In combination With a graphophone ber mounted on the said support, an elastic sound-box having a stylus-bar, a detachable pad on said flexible member to engage a support extending Wholly across the front of stylus-bar, and means for adjusting the tenthe sound-box, a yielding member attached sion of the flexible member.

5 to the support and engaging the stylus-bar of In testimony whereof I aflix my signature 15 the sound-box, and means for adjusting the in presence of tWo Witnesses. yielding member. FRANK N. FOSTER.

5. The combination of a support having l/Vitnesses: opposing members adapted to embrace the LUTHER V. MoULToN,

1o sound-box of a graphophone, a flexible mem- 1 GEORGIANA CHAoE. 

